Moving from a pandemic to Covid becoming endemic- barring no significant variants arise- will not make Covid rare and the unvaccinated will still be a liability for business operations. You can see the disruption to our economy from Covid today, in real time with very few restrictions in America.
Maybe in 2-3 years of endemic levels of Covid creating widespread immunity, vaccination requirements may come off of the books. But having a stable business operation demands having a vaccinated workforce right now.